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| ISO-9001 CERTIFIED BY DSCC M.S.KENNEDY CORP. FEATURES: HIGH CURRENT, LOW DROPOUT VOLTAGE REGULATORS 5115 SERIES 4707 Dey Road Liverpool, N.Y. 13088 Electrically Isolated Top Tab or Z Tab SIP Extremely Low Dropout Voltage: 350mV @ 1.5 Amps Available in 3.3V, 5.0V, 12.0V and Adjustable Versions Open Collector Error Flag Output TTL Level Enable Pin: Zero Current Shutdown Mode Reverse Battery and Load Dump Protection Low Ground Current: 22mA Typical at Full Load 1% Maximum Guaranteed Accuracy Output Current to 1.5 Amps (315) 701-6751 MIL-PRF-38534 QUALIFIED DESCRIPTION: The MSK 5115 series voltage regulators are available in +3.3V, +5.0V, +12.0V or adjustable output configurations. All boast ultra low dropout specifications due to the utilization of a super PNP output pass transistor with monolithic technology. Dropout voltages of 350mV at 1.5 amps are typical in this configuration, which drives efficiency up and power dissipation down. Accuracy is guaranteed with a 1% maximum output voltage tolerance. The series also offers a TTL/CMOS compatible on/off enable function as well as an output flag pin. The MSK 5115 series is packaged in a space efficient 5 pin power SIP available in two styles with three lead bend options. EQUIVALENT SCHEMATIC Schematic shown for fixed output voltage versions TYPICAL APPLICATIONS High Efficiency, High Current Linear Regulators Constant Voltage/Current Regulators System Power Supplies Switching Power Supply Post Regulators Battery Powered Equipment 1 PIN-OUT INFORMATION MSK5115-00 1 2 3 4 5 Enable Vin Ground Vout Adjust MSK5115-3.3,-5.0,-12 1 2 3 4 5 Enable Vin Ground Vout Flag Rev. B 7/00 ABSOLUTE MAXIMUM RATINGS VINP VIN VEN IOUT Input Voltage (100mS 1%D.C.) -20V to +60V Input Voltage 26V Enable Voltage -0.3V to 26V Output Current 3.5A TJ ELECTRICAL SPECIFICATIONS Parameter Output Voltage Tolerance Dropout Voltage Load Regulation Line Regulation Output Current Limit Ground Current Output Noise 2 2 2 2 Test Conditions 1 3 Group A Subgroup 1 2,3 1 1 1 2,3 1 2,3 1 1 1 1 1 1 - MSK 5115B SERIES Min. 2.4 1.22 Typ. 0.5 1.0 80 350 0.2 0.3 0.05 0.5 2.1 8 22 400 1.2 1.2 20 1 10 0.01 0.2 75 1.24 20 40 2.4 130 Max. 1.0 2.0 200 600 1.0 2.0 0.5 1.0 3.5 20 0.8 75 2 20 2 0.4 1.26 120 2.6 - MSK 5115 SERIES Min. 2.4 1.22 Typ. 0.5 80 350 0.2 0.3 0.05 0.5 2.1 8 22 400 1.2 1.2 20 1 10 0.01 0.2 75 1.24 20 40 2.4 130 Max. 1.0 225 625 1.2 0.6 3.5 20 0.8 75 2 20 2 0.4 1.26 150 2.7 Units % % mV mV % % % % A mA mA V V V A A A A V mV V ppm/C IOUT=1A; VIN=VOUT+1V VOUT=-1%; IOUT=100m A VOUT=-1%; IOUT=1.5A VIN=VOUT+5V 10mA IOUT 1.5A (VOUT +1V) VIN 26V IOUT=10mA VOUT=0V; VIN=VOUT+1V VIN=VOUT+1V; IOUT=0.75A VIN=VOUT+1V; IOUT=1.5A CL=10F; 10Hz f 100KHz HIGH/ON LOW/OFF HIGH/ON LOW/OFF VENABLE 0.8V VOH=26V IOL 250A; VIN=VOUT-2V VIN=VOUT-7% Normal Operation Normal Operation Full Temp; VIN=VOUT+1V Junction to Case TJ 2 Enable Input Voltage Enable Input Current 2 Shutdown Output Current 2 Flag Output Leakage 2 Flag Threshold 29 9 Flag Output On Voltage 9 Reference Voltage 8 Reference Voltage Temp Drift 2 8 Adjust Pin Bias Current 2 8 Thermal Resistance 2 Thermal Shutdown 2 NOTES: 1 Output decoupled to ground using 20F minimum capacitor unless otherwise specified. 2 This parameter is guaranteed by design but need not be tested. Typical parameters are representative of actual device performance but are for reference only. 3 All output parameters are tested using a low duty cycle pulse to maintain TJ = TC. 4 Industrial grade devices shall be tested to subgroup 1 unless otherwise specified. 5 Military grade devices ('B' suffix) shall be 100% tested to subgroups 1,2,3. TC=+25C 6 Subgroup 1 Subgroup 2 TJ=+125C Subgroup 3 TA=-55C 7 Please consult the factory if alternate output voltages are required. 8 Applies to MSK5115-00 adjustable version only. 9 Applies to fixed output devices only. PART NUMBER MSK5115-00 MSK5115-3.3 MSK5115-5.0 MSK5115-12 OUTPUT VOLTAGE Adjustable +3.3V +5.0V +12.0V 2 Rev. B 7/00 TST TLD Storage Temperature Range -65C to +150C Lead Temperature 300C (10 Seconds Soldering) Operating Temperature MSK 5115 Series -40C to +85C MSK 5115B Series -55C to +125C nA C/W C APPLICATION NOTES REGULATOR PROTECTION: The MSK 5115 series is fully protected against reversed input polarity, overcurrent faults, overtemperature conditions (Pd) and transient voltage spikes of up to 60V. If the regulator is used in dual supply systems where the load is returned to a negative supply, the output voltage must be diode clamped to ground. HEAT SINK SELECTION: To select a heat sink for the MSK 5115, the following formula for convective heat flow may be used. Governing Equation: Tj = Pd x (Rjc + Rcs + Rsa) + Ta WHERE: Tj = Junction Temperature Pd = Total Power Dissipation Rjc = Junction to Case Thermal Resistance Rcs = Case to Heat Sink Thermal Resistance Rsa = Heat Sink to Ambient Thermal Resistance Ta = Ambient Temperature First, the power dissipation must be calculated as follows: Power Dissipation = (Vin - Vout) x Iout OUTPUT CAPACITOR: The output voltage ripple of the MSK 5115 series voltage regulators can be minimized by placing a filter capacitor from the output to ground. The optimum value for this capacitor may vary from one application to the next, but a minimum of 10F is recommended for optimum performance. Transient load response can also be improved by placing a capacitor directly across the load. LOAD CONNECTIONS In voltage regulator applications where very large load currents are present, the load connection is very important. The path connecting the output of the regulator to the load must be extremely low impedance to avoid affecting the load regulation specifications. Any impedance in this path will form a voltage divider with the load. The MSK 5115 series requires a minimum of 10mA of load current to stay in regulation. Next, the user must select a maximum junction temperature. The absolute maximum allowable junction temperature is 125C. The equation may now be rearranged to solve for the required heat sink to ambient thermal resistance (Rsa). EXAMPLE; An MSK 5115-3.3 is configured for Vin=+5V and Vout=+3.3V. Iout is a continuous 1A DC level. The ambient temperature is +25C. The maximum desired junction temperature is 125C. Rjc = 2.6C/W and Rcs = 0.5C/W typically. Power Dissipation = (5V - 3.3V) x (1A) = 1.7 Watts Solve for Rsa: Rsa = 125C - 25C - 2.6C/W - 0.5C/W 1.7W = 55.72C/W In this example, a heat sink with a thermal resistance of no more than 56C/W must be used to maintain a junction temperature of no more than 125C. The MSK 5115-00 is an adjustable version in the series of high performance regulators. The diagram below illustrates proper adjustment technique for the output voltage. The series resistance of R1+R2 should be selected to pass the minimum regulator output current requirement of 10mA. ENABLE PIN The MSK 5115 series of voltage regulators are equipped with a TTL compatible ENABLE pin. A TTL high level on this pin activates the internal bias circuit and powers up the device. A TTL low level on this pin places the controller in shutdown mode and the device draws only 5A of quiescent current. If the enable function is not used, simply connect the enable pin to the input. FLAG OUTPUT PIN: All of the fixed output voltage versions of the MSK 5115 series are equipped with a flag output pin. Since the flag pin is an open collector configuration it can be pulled up to any voltage between 3V and 26V. This feature allows direct interfacing to practically any logic. This active low output has a typical level of 0.22V when the flag comparator detects an "out of regulation" condition. Flag states include low input voltage, out of regulation and output current limit. Extremely high level input voltage transients will also cause the flag output pin to activate. MSK5115-00 OUTPUT ADJUSTMENT: DEVICE/CASE CONNECTION: The MSK 5115 series are highly thermally conductive devices and the thermal path from the package heat sink to the internal junctions is very short. Since the case is electrically isolated from the internal circuitry, the package can be directly connected to a heat sink. 3 Rev. B 7/00 TYPICAL PERFORMANCE CURVES 4 Rev. B 7/00 MECHANICAL SPECIFICATIONS NOTE: ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED. ESD Triangle indicates Pin 1. ORDERING INFORMATION MSK5115-3.3 B T U LEAD CONFIGURATIONS S= STRAIGHT; U= BENT UP; D= BENT DOWN PACKAGE STYLE T= TOP TAB; Z= Z PACK SCREENING BLANK= INDUSTRIAL; B= MIL-H-38534 OUTPUT VOLTAGE 00=ADJ; 3.3=+3.3V; 5.0=+5.0V; 12=+12.0V GENERAL PART NUMBER The above example is a +3.3V, Military regulator using the top tab package with leads bent up. 4707 Dey Road, Liverpool, New York 13088 Phone (315) 701-6751 FAX (315) 701-6752 www.mskennedy.com The information contained herein is believed to be accurate at the time of printing. MSK reserves the right to make changes to its products or specifications without notice, however, and assumes no liability for the use of its products. M.S. Kennedy Corp. 5 Rev. B 7/00 |
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